Weather on March 21
San Ramon, CA
55 Years of Data
Avg High
62°F
Avg Low
43°F
Warmest
2026
68°F avg
Coldest
1982
37°F avg
About This Date
March 21st in San Ramon, CA typically brings mild spring weather, with average highs around 62°F and lows near 43°F. Over 55 years of records, the warmest March 21st was in 2026 (68°F average), while the coldest was 1982 (37°F) — a 31°F range across recorded history. Rain or other precipitation has occurred on about 16% of March 21st dates historically, with the wettest March 21st recording 3.15" of rain. The last decade has been 7.4°F cooler on this date compared to 20-30 years ago.
The last decade has been 7.4°F cooler on this date compared to 20-30 years ago.
Planning for March 21st in San Ramon, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 82° | 53° | 68° | — | — |
| 2025 | 60° | 38° | 49° | — | — |
| 2024 | 69° | 47° | 58° | — | — |
| 2023 | 50° | 38° | 44° | 0.2" | — |
| 2022 | 63° | 47° | 55° | — | — |
| 2021 | 53° | 41° | 47° | — | — |
| 2020 | 55° | 42° | 49° | — | — |
| 2019 | 52° | 39° | 45° | — | — |
| 2018 | 51° | 44° | 48° | 3.15" | — |
| 2017 | 53° | 46° | 50° | 1.91" | — |
| 2016 | 61° | 43° | 52° | 1.02" | — |
| 2015 | 67° | 50° | 58° | — | — |
| 2014 | 69° | 51° | 60° | — | — |
| 2013 | 53° | 35° | 44° | — | — |
| 2012 | 58° | 45° | 51° | — | — |
| 2011 | 45° | 37° | 41° | 0.51" | — |
| 2010 | 66° | 49° | 57° | — | — |
| 2009 | 69° | 41° | 55° | — | — |
| 2008 | 58° | 30° | 44° | — | — |
| 2007 | 67° | 43° | 55° | — | — |
| 2006 | 55° | 39° | 47° | — | — |
| 2005 | 62° | 48° | 55° | — | — |
| 2004 | 75° | 50° | 63° | — | — |
| 2003 | 70° | 44° | 57° | — | — |
| 2002 | 71° | 46° | 59° | — | — |
| 2001 | 71° | 50° | 61° | — | — |
| 2000 | 71° | 54° | 62° | — | — |
| 1999 | 60° | 46° | 53° | — | — |
| 1998 | 63° | 50° | 56° | — | — |
| 1997 | 76° | 57° | 66° | — | — |
| 1996 | 66° | 47° | 56° | — | — |
| 1995 | 51° | 41° | 46° | — | — |
| 1994 | 60° | 45° | 52° | — | — |
| 1993 | 68° | 48° | 58° | — | — |
| 1992 | 53° | 50° | 52° | — | — |
| 1991 | 54° | 41° | 47° | — | — |
| 1990 | 71° | 49° | 60° | — | — |
| 1989 | 69° | 46° | 58° | — | — |
| 1987 | 52° | 31° | 41° | 1.07" | — |
| 1986 | 69° | 41° | 55° | — | — |
| 1985 | 67° | 36° | 51° | — | — |
| 1984 | 74° | 40° | 57° | — | — |
| 1983 | 50° | 38° | 44° | 1.68" | — |
| 1982coldest | 42° | 32° | 37° | — | — |
| 1981 | 47° | 40° | 43° | 1.6" | — |
| 1980 | 54° | 36° | 45° | — | — |
| 1979 | 62° | 40° | 51° | — | — |
| 1978 | 67° | 51° | 59° | — | — |
| 1977 | 67° | 45° | 56° | — | — |
| 1976 | 71° | 45° | 58° | — | — |
| 1975 | 47° | 35° | 41° | — | — |
| 1974 | 67° | 40° | 53° | — | — |
| 1973 | 47° | 34° | 40° | 0.76" | — |
| 1972 | 72° | 46° | 59° | — | — |
| 1971 | 71° | 49° | 60° | — | — |
55 years of data from LIVERMORE CALIFORNIA